Automatic lock for elevator doors



C. E. IVES AUTOMATIC LOOK FOR ELEVATOR 1100116 Filed March 13, 1926 IHM I v wwmwf hll OOOOOOOOODOOQOOOOOOOOO normal orlocking condition;

Patented Dec. 14, 1926. V

* UNET s re res F FlCE.

omr'ronn E. IVES, or on oneo, iLLINoIs, AssIoNoB or ONE-THIRD T0 ANDREW o. I PEBBLE-AND TWO-THIRDS T0 rvE's & srnrm, 1 VOLUNTARY ASSOCIATION, BOTH OF CHICAGO, ILLINOIS.

AUTOMATIC LOCK ron ELEVATOR noons Application filedilfarch 13,1926, Serial 1%.,94574.

My inventionrelates to automatic locks for elevator doors and'has to do more particularly with such'locks as are adapted for holding the sliding doors closed except whenand at which an automatic lock of the above; character.

' which is sturdy in construction, positive in operation, comparatively cheap to manufao- 'ture, andsimple and of few parts. Fora better understanding of tion reference is to be had to the accompanying drawing,-in which the line 1%1I-o'f Fig.3, with the parts in Fig. 2 is a cross sect onal view alongthe line 22 of Fig.1;

Fig. 3 is-a vertical cross" sectional view along the line 3 3 of Fig." 1 with thefparts' in' normal or looking condition;

Fig. 4 is a vertical sectional view along the line 1-4 of'Fig. 1 with the'elevator operated lever actuated to release the lock-" double door; 1

ing arm, so as to permit opening the door; ,Fig. 5 is a diagrammatic view illustrating one form of application of the lock to ;a'

Fig. 6 shows a ing rail cut away for the'locking bolt; and Fig. 7 is a diagrammaticview of an eleinterposed therein, t V

Referringnow'more in detail a the construction employed, I have shown the lock applied adjacent avertically slidable door A Whichdoor is mounted by its side angle iron 10 between the wall slide, which consists of the inner and outer rails 1112:separated'by'th'e interposed strip 13 so as to form'a' gui'deway 14 in which the one flange of the angle iron lO'rides. j In the upper sliding door construction, upper and lower doors A and B are pro: vided which slide in the guideways as stated, being connected by a chain 15 running over a pulley 16 and having its oppositeends connected to the doors A and B so that as vator' control circuit with the lockfcontacts p I the shoulder 30' of the slot engaging'the' pin one section of the door is operated the other my inven section of the lock supports 3 one will likewi sel mo-ve chain 15-is thus positioned so that an intermediate space 17 is provided, anditis this space that my lock is adapted to fit.

Referring now 'morein detail to the lock construction, it comprises a suitable housmg C which isa self-contained unit and adapted 1 to be applied to the outer side of the rail 12 I by screws 18, said rail 12 being cut away as indicated at 19in Fig; .6 to permit the lock- 7 ing bolt to pass through into the path of the door. y

The locking bolt D is preferably in the form ofa pivotally mounted barsupportedj upon a shaft 20 extending through the walls ofthe casingC, thebolt 1) being freely ro-.

I tata'ble upon the shaft which is fixed. This Fig. 1 is a face view of the lock applled; adjacent-theelevator door and shown. along bolt is very effective because'of its peculiar extending arm 21 normally passing through angle 10 to lock it against opening The shape and disposition, the upper-laterally locking bolt D extends downwardly, carry-. ing a stud22 at itslower end which stud serves several dilferent'purposes. For one thing,-it is engaged by one arm of spring 23 which normally presses, against; the stud 22 so as to'hold the locking. extension 21 in the path of the door. Thisstud 22 alsocoo-per- I ates with a locking-barQE, which bar'is jslidably supported by shafts 20 and 25 by having the portions 2627 positioned. be-

tween said shafts 20 25 and the wallv28 of'the'casing. ijThis locking bar E has a locking slot 29 through which the locking pin '22extends, the bar E being shown in its normal or looking position-in Fig. 3 with I 22 so as to prevent movementof the locking thereby permit opening of the doors,the locking barE must be actuated to free the pin 22 carried by bolt-D.v In order to move I'provide an elevator actuated arm F which is adjustably mounted upon a rotatably sup- .portedshaft 25, so that the arm may beadjusted to properly'meetth'e actuating cam bolt D. Beforethis boltmay be moved. an

"- the locking bar E so as to unlock the bolt,

82 carried by the elevator. This arm F has;

the cam 32 are. so positioned that whenthe elevator isat rest at each'fi'oor in alignment C with the fioor, the cam 32 is holding the arm F in an actuated position to unlock the alternate or unlocking position, the stud 35 moves the locking arm E into its alternate or unlocking position as indicated in Flg. a.

That is, the bar E isdrawn downwardly so that'the shoulder 30 is moved free ofthe pin 22, thereby freeing the bolt Dto permit opening the door.

' It will thus be seen that when the elevator comes to rest at the floor, the arm F has unlocked the bolt D. Therefore if the door A i'snow moved upwardly, the flange of the angle '10 engages the under face of the lateral extension 21. Because of this extension being lateral of the pivot point 20, a continued upward movement of the door is permitted, the angle l merely pushing the bolt extensionfll' over as indicatedin Fig. i. This extension 21, which projectsinto the'slideway 14: as indicatedin Fig. 2, has a small extension towar-dthe left to give the extension QI-its broadest face so as to more positively be in-a position for engagement bythe'flange ofthe angle 10. These angles and doors sometime. fit very loosely, and for this reason it is desirable to have this extension 21 as wide as possible.

As so far explained, thedevice is adapted to maintain the elevator door locked except vith the floor.

As ameasur'e of safety and in order to prevent actuation of the elevator while any doorris open, I provide a pair of contacts when the elevator is in a position registering 37 -38 which arev adapted to be interrupted whenever the 'lock is in ayposition to release the door, these contacts being adapted to be connected in any suitable part of the elevator control circuit so as to disable-it and render it inoperative while any door is open. To this end I provide means for 1nterrupting the circuit through these contacts 3738 when the locking bolt 21is in" an unlocking position and the door open as indicated in Fig. 4. Therefore I provide a lever 39 which is pivotally supported upon the shaft and has an upper forked end surrounding the stud 22" carried by the bolt D. The lower end of arm 39 carries a contact'making stud 40' adapted to close circuit across the contacts 37-38 when the lock is in looking position. This lever 39 is preferably ofinsulating material such as bakelite, so as to insulate the contact maker 40 from the rest. of the apparatus. The-- contacts 37-38 are of a resilient material such aslaminated spring'bronze andare clamped between the parts 41 42 of the supporting insulating block with a hole 43 adjacent each spring to receive the end of a conductor 44. A set screw 45 is provided for each terminal and access to this set screw is secured by removingthe cover platc 4-6. Thus to apply the conductor, the cover plate 46 is removed and the conductor inserted through an opening 47 in the lower end of the casing and slipped up into the hole ad acent the contact spring, after which a the set screw 45 '18 set to hold the conductor against the contact. The plate 46 may then be applied so as to complete the enclosure.

In Fig 7 I have showndiagrammatically an elevator control circuit with the starting or control 7 lever 50 including conductors opening and closing the circuit of the motor M through the contacts 5 l which lead to the main 55. 1 11 this control circuit running Iii-t2 which extend to a solenoid 53 for r and the elevator rendered inoperative. In

order to'close the circuit again, it necessary to close the door.

will be It willthus be seen that I have provided construction and operation in that it is of compact. form and arranged to be positioned between the narrow confines of the connect ing chain on the door; it is of a construction which'positively locks the door against jimmying, such as has been possible in prior locks; also the parts are so distributedand posed thereon; Also the circuit interrupter with the operating levers are of positive and ion an automatic lock having certain features of i so shaped as to give the greatest strength,

sturdy construction as compared with the ob ectionable yielding arm dev1ces heretofore used. Although I have shown a specific form of lock, 1 contemplate constructingit in other'ways than that shownyand therefore do not desire to be limited to the eXact structure shown, but aim to cover all that which comes within the. spirit and scope of the appended claims.

hat I claim as new and desire to by United States Letters Patent is 1. An automatic lock for elevator sliding secure doors including a vertically disposed pivotally' mountedlocking'bolt having a lateral locking extension adapted to be placed in I the path of a sliding door to positively lockthe door, a vertically sliding reciprocable bar 'normally holding the, bolt against unlocking movement, and an elevator actuated lever for moving the bar'to unlock the bolt to permit movementiof the bolt by opening the door when the elevator 'registers with thefloor. .7 v 2(An automatic 'lock for elevator sliding doors'including a verticallydisposed intermediately pivotally mountedfllocking bolt having a lateral locking extension at its .upper end adapted tobe placed in the path of a sliding door to positively lock the door, a vertically slidingreciprocable bar normally engaging a lateral extension ton-the bolt for holding the bolt against unlocking movement, and an elevator actuated lever for moving the bar to unlock the bolt to permit movement of the bolt by opening'the door when the elevator registers with the floor;

3. An automatic lock for elevator sliding doors including a' vertically disposed pivot- V ally mounted locking bolt having a lateral locking extensionadapted tobeplaced in the-path of a sliding door to positively lock the door, a vertically sliding reciprocable bar'normally holding the bolt against unlocking movement, an elevator actuated V lever for moving the, bar to unlock the bolt to permit movement of the bolt by opening the door when the elevator regis ters with the floor, a circuit interrupter, and

means for operating the interrupter torrende'ring the elevator lnoperative responsive to actuation of the locking bolt when the door is opened; V 4. An automatic lock doors including a vertically disposed pivot V mediately' pivotally mounted locking bolt" ally mounted locking bolt having a lateral locking extension ada'pt'ed'to be placed in the path of a'sliding doorto positively lock the door, a vertically sliding reciprocable bar normally holding the bolt against. un-

locking movementyand an elevator actuated lever for moving the bar tounlock the bolt to permit movement of the bolt by opening "the door when the elevator registers with the floor, saidelevator actuated lever being restorable when'the door'is again closed and the elevator moves 'awaytrom the floor to restore the bar to again lock the bolt.

' 5. An automatic lock for elevator sliding doors including a vertically disposed interhaving a lateral locking extensionat its upper end adapted to be placed in-the path of. a sliding doorto positively lock the door, a

vertically sliding reciprocable bar normally vin the path of the lower'endof the locking bolt to hold it against unlocking movement 'byithe door, and an elevator actuated lever connected with the bar to move the latter out of the path of the lockingbolt to release the latter'when the 'elevator stops in registration with the floor.

6.;An automatic 1001: for'elevator sliding doors including a vertically disposed inter-- 'mediately pivotally' mounted locking boltihaving a lateral lockinge'xtension at its up--' per end adapted tobe placed in the path of a sliding door to'positively lock the door, a

vertically sliding reciprocablefbar normally inthe path of the lower .end of theflocking boit'stoliol'd it againstjunlocking movement bythe door," an elet'zator actuated lever connectedwith the bar to move the latter out of :the path of the locking bolt to release the latter-when the elevator stops in registration with the floor, a circuit interrupter, and an connected with the lower end of the locking bolt and its other-end] connected with the circuit interrupter, whereby when the door 'intermediately pivoted lever having one end V is opened the locking bolt is moved to actu- I end of the'casing and longitudinally disposed therein, alateral extension at oneend of the bolt adapted to be placed in the path of a slidingdoor to positively lock the latter, an elevator actuated lever mounted upon a shaft spaced apart from the bolt shaft'in said casing, a bar slidingly held in the cas ing by said two shafts, means normally in,- terlocking the bar and bolt to prevent movement ofrthe bolt so .as to lock the door, for V elevator sliding and means responsive to-i"operation of the elevator actuated lever for operating the i bar to release the bolt and permit opening the door-land the operation of the bolt thereby when the elevator registers with the V T 8. An automatic: lockofor elevator sliding doors including an elongated narrow rectangular casing, a locking bolt intermediately pivotally supported upon a' shaft at one end of the casing and longitudinally disposed therein, a lateral extension at one end of the bolt adapted to be placed inthe pathof a sliding door to positively lock the latteig an elevator actuated lever mounted upon a shaft spaced apart from the bolt shaft in said cas I 1ng,,a bar slidingly held in the casing by said two shafts, means normally interlock ing the bar and bolt to prevent movement of the bolt so as to lock the door, and'means responsive to operation of the elevator actuv ated lever for operating'the bar to-release the bolt and permit opening the door and the operation of the bolt thereby when the elevator registers with the floor, said last means including transverse stud carried by said elevator actuated lever shaftand extending into operative engagement With the sliding bar. 7

9. An automatic lockvfor elevator sliding doors including an elongated narrow rectangular casing, a locking bolt intermediately pivotally supported upon a shaft at one end of the casing and longitudinally disposed therein, a lateral extension at one end of the boltadapted to be placed in the path of a sliding doorto positivelylock the latter,

7 an elevator actuatedlover mounted upon a shaft; spaced apart from the bolt shaft in said casing, a bar slidingly held in the easing by said two shafts, means normally interlocking the bar and bolt to prevent movement of the bolt so as to lock the door, means elevator responsive to operation of the elevator ac tuated lever for operating the bar to release the bolt and permit openingthe door and the operation of the bolt thereby When the elevator registers With the floor, a circuit interrupter positioned atthe other end of the casing, and a lever pivotally mounted in the casing between the locking bolt and interrupter having one end connected with the bolt and the other end With the inter rupter to operate the latter-and render the inoperative when the door is opened.

In Witness whereof; I. hereunto subscribe my name this 5th day of March, 1926;

' CLIFFORD E. IVES. 

